Hello all I am a complete newbie to this and I am trying to learn from reading you guys posts. I have a stock 2003 GMC Sierra 4.3L V6 truck and my father passes away and left it to me. It has oversize tires on it so I did change that with the tire size editor and it made a big difference I think cause now it does not Rev so high before changing gears (Shifting). It seems to me to be weak on power and I was wondering if some of you more experienced guys could take a look at this tune file and adjust it so that it has a little more power. Please don't flog me for asking I do not mean anyone any harm. I am a totally newbie and all help and suggestions will be greatly appreciated.
2003 GMC Sierra Stock OEM File.hpt. Thanks James